fix header

docs/modules/networking/pages/monkey_zone.adoc

@@ -1,11 +1,7 @@
 = Monkey Zone: Multi-player Sample Project
-:author:
-:revnumber:
-:revdate: 2016/03/17 20:48
+:revnumber: 2.0
+:revdate: 2020/07/24
 :keywords: network, basegame, physics, inputs, spidermonkey
-:relfileprefix: ../../
-:imagesdir: ../..
-ifdef::env-github,env-browser[:outfilesuffix: .adoc]
 
 
 MonkeyZone is an multi-player demo game provided by the jME core developer team.